Calling overridable methods during construction poses a risk of invoking methods on an incompletely constructed object
and can be difficult to discern. It may leave the sub-class unable to construct its superclass or forced to replicate
the construction process completely within itself, losing the ability to call super().
If the default constructor contains a call to an overridable method, the subclass may be completely uninstantiable.
Note that this includes method calls throughout the control flow graph - i.e., if a constructor Foo() calls
a private method bar() that calls a public method buz(), this denotes a problem.
<br/>Example :
<pre>
public class SeniorClass {
  public SeniorClass(){
      toString(); //may throw NullPointerException if overridden
  }
  public String toString(){
    return "IAmSeniorClass";
  }
}
public class JuniorClass extends SeniorClass {
  private String name;
  public JuniorClass(){
    super(); //Automatic call leads to NullPointerException
    name = "JuniorClass";
  }
  public String toString(){
    return name.toUpperCase();
  }
}
</pre>

<p>
  This rule is deprecated, use {rule:java:S1699} instead.
</p>
